Every bitcoin is divisible down to eight decimal places . The smallest possible unit is called a satoshi (or "sat"), named after Bitcoin’s pseudonymous creator, Satoshi Nakamoto.
Yes, you can absolutely buy half a bitcoin. In fact, you can buy much smaller fractions than that. Bitcoin was designed to be highly divisible, allowing anyone to participate regardless of whether they can afford a full "whole" coin. The Mechanics of Divisibility can you buy half a bitcoin
Because the price of a full bitcoin has risen into the tens of thousands of dollars, most retail investors today do not purchase an entire coin at once. Every bitcoin is divisible down to eight decimal places
One satoshi is equal to 0.00000001 BTC . There are 100 million satoshis in one full bitcoin. In fact, you can buy much smaller fractions than that
A single bitcoin is not an indivisible unit like a physical gold bar; instead, it is more like a digital dollar that can be broken into cents.